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- a49008171 contributor B12858249.
- a49008171 created "1948.".
- a49008171 date "1948".
- a49008171 date "1948.".
- a49008171 dateCopyrighted "1948.".
- a49008171 description "Bibliography: p. 41-46.".
- a49008171 description "Thesis--Johns Hopkins Univ.".
- a49008171 extent "v, 46 p.".
- a49008171 issued "1948".
- a49008171 issued "1948.".
- a49008171 language "eng".
- a49008171 subject "372.7".
- a49008171 subject "Arithmetic Study and teaching.".
- a49008171 subject "QA135 .K57".
- a49008171 title "An investigation of experimental studies which compare methods of teaching arithmetic.".
- a49008171 type "text".